Scientific American Public Domain Materials, Oldest US science mag (est. 1845). Features contributions from Einstein & Nobel laureates. Public domain only (fansite)

David Ricardo, On The Principles of Political Economy, and Taxation

P. T. Barnum, The Art of Money Getting; Or, Golden Rules for Making Money

William Cobbett, Cottage Economy, to Which is Added The Poor Man's Friend

CG Jung , Carl Gustav Jung, Swiss psychiatrist and psychoanalyst. Founder of analytical psychology.